SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
	Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person* Pedersen Leif E (Last) (First) (Middle) C/O CERTARA, INC. 4 RADNOR CORPORATE CENTER, SUITE 350 (Street) RADNOR PENNSYLVANIA 19087 (City) (State) (Zip) UNITED STATES (Country)	2. Issuer Name and Ticker or Trading Symbol Certara, Inc. [ CERT ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director 10% Owner X Officer (give title below) Other (specify below) PRESIDENT, CHIEF COMMERCAL OFF
	2a. Foreign Trading Symbol
	3. Date of Earliest Transaction (Month/Day/Year) 05/11/2026	6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person
	4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Performance Stock Units	(1)	05/11/2026		D			68,348	(1)	(1)	Common Stock	68,348	$0	0	D
Performance Stock Units	(1)	05/11/2026		A		68,348		(1)	(1)	Common Stock	68,348	$0	68,348	D
Restricted Stock Units	(2)	05/11/2026		A		74,074		(2)	04/01/2029	Common Stock	74,074	$0	74,074	D
Performance Stock Units	(3)	05/11/2026		A		111,111		(3)	(3)	Common Stock	111,111	$0	111,111	D

Explanation of Responses:

1. Each Certara, Inc. ("Company") performance stock unit ("PSU") was granted on May 20, 2025, pursuant to the terms of the 2025 Long-Term Incentive Plan for Company executives approved by the Compensation Committee of the Company's Board of Directors, under the Certara 2020 Incentive Plan (the "2020 Incentive Plan"). Each PSU represents a conditional right to receive one share of Company common stock. The reporting person will be entitled to receive a number of shares between 0% and 200% of the target amount reported based on the Company's performance against certain total shareholder return thresholds through the period ending on March 31, 2028.

2. Each restricted stock unit ("RSU") was granted on May 11, 2026, under the 2020 Incentive Plan and represents a right to receive one share of common stock or the cash equivalent. The RSUs will vest and settle in three equal installments on April 1, 2027, April 1, 2028, and April 1, 2029.

3. Each Company PSU was granted on May 11, 2026, pursuant to the terms of the 2026 Long-Term Incentive Plan for Company executives approved by the Compensation Committee of the Company's Board of Directors, under the 2020 Incentive Plan. Each PSU represents a conditional right to receive one share of Company common stock. The reporting person will be entitled to receive a number of shares between 0% and 200% of the target amount reported based on the Company's performance against certain total shareholder return thresholds through the period ending on March 31, 2029.

	/s/ Daniel D. Corcoran, as Attorney--in-Fact for Leif E. Pedersen	05/13/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)